Refrigerating apparatus.



M. AUDIFFREN al H. A. SINGRUN.

REFRIERATING APPARATUS.

APPLICATION man MAY 27. 1912.

Patented 0ct. 5, 1915.

5 SHEETS-SHEET1 INVENTRS y AT TORNEYS WITNESSES:

IVI. AUDIFFREN & H. A. SNGRN.

` REFRIGERATING APPARATUS.

APPLICATIONVHLEUMAYU,1912.

Patented Oct. l5, 1915.

WITNESSES: W

ff Y

M. AUDIFFREN & H. A. SINGR'U'N.

REFRIGERATING APPARATUS. l APPVLIATION FILED MAY 27, 1912. 1,155,780D Patented Oct. 5,1915.

5 SHEETS-SHEET 3.

INVENTQ l ,SM/M

I ATTORNEYS \\,fr///////// .//f W1# Y n/ l I l I WITNESSES IvI. AUDIFFIIEN @I II. A. SINGRUN.

REFRIGERATING APPARATUS.

APPLICATION FILED MAI/27, 1912.

Patented Oat. 5, 1915.

5 SHEETS-SHEET 4.

ATTORNEYS IvI. AUDIFFREN &,II. A. SINGRU'N.

REFRIGERATING APPARATUS.

APPLICATION FILI-:D MAY 27. 1912.

Patented OGt. 5, 1915.

s sIIEETsisHEET 5.

' INvENToRs W .2 r i WITNESSES:

ATTORNEYS 'MARCEL .'A'UDIFFREN,' OF GOLBEY, NEAREPINAL, AND' HENRI' ALBERT SINGrBfIl'll,l 0F

EPINAL, FRANCE,- AssIGNoRs mo'AUnIFF'REN' .'REFRIGEBATING 'MACHINE com- PANY, A CORPORATION-or NEW JERSEY.

' anrn'renaafrmc APPARATUS.

'- Appiiationmea-Nayz'z,1312. seria1'Np.e 99,s ee."

,Specification of I Let'teriPatent,VY Pat'nted @h 5,1915,`-

To all what?, imag concern; l

Be it known that We, MARCELAUDHFREN,

v Aa citizen of-'the Republic of France, resid-.

ing at Golbe'y, near Epinal, .Franca and HENRI ALBERT SINGRN, av Vcitizen of -the Vosges, France, have inv'ented certain. new and useful Improvements '1n Refrigerating Apparatus; and We do-hereby declare the.

follow-ing to be-a lfull, clear, and exact description of the invention, 'such as W1ll en-r able others skilled in the art'tov vvhichitap pertainsto make and-.use the same..

-This invention is directed to thedevelop- `ment 'frefrigerating apparatus of that type in' Which asuitable material in the formof a saturated or approximately saturated val por orgas is `c onined ina container,'and is' in' one por'tio of the container, acted .upon mechanically/ri potential energy in the formof heat whichv dium outside that portion. of the-container, inl order that' thematerial ivithinthe coneA tainer lmay eii'ect `refrigeration ofa medium lsurrounding anotherV portion"of-'the con;

" vt'ainer byl absorbing jheatptherefrom` .as "it v vaporizes Within that-part tof the' 'oo i'it'ain'e1'-.k

While a number ofmateri'als maybe used,

sulfur dioxid (so.) eminently. Suitable; -in View of its relatively lovg saturated vapor.

pressure at 'tha-ordinary. temperaturesfto "approximately.samedi' vapore; gas f tainenin order 'tliatt ina'y 1re-absorb` heat o causeittolliquefy and lose'l l long periods, under considerable pressure, in

.have called for the production of thev her.-l 'metically sealed typeyof refrigeratingap-V Republic` `of France,'residingl at Epinal,

paratus,a formof which is described and shown in U. S. Patent :No. 551,107, granted of the aboye-named applicants, in which apparatus a compressor is placed Within a hermetically sealed container and the complementaryworking parts of the compressor are respectlvely connected .with a weight which does not revolve andai/ith the con tainer Whi'ch'is rotated fromiwithout. 11n asecond U.'v S. PatentNo. 764,515, "granted- July 5, 1904:, to the' same' inventorgfa Tina'-l `Chine lof thesam'etype as' shown-and de .scribed is 'provided with' alubricating sys-.

tem. 'A third U. S, Patent No. .898,400-Was granted September :8, 1908, 'to the' present applicants, namely Marcely Audilren and 'Henri'Albert S-ingriin, for improvements in fa'machine of similar t'ype`. The-present im'- lprovements-are illustrated and described in' -i connection'with a' machine similar in many "respects to those'shown iI 1- the*above-named "The present invention resides in improvementsin the organization-i of, the inclose'd working 'parts and'jin thej'disposition and construction of thev lubricating and ldistrib'- utln mac 'ne-'of thehermeticallysealedtype, and .in'fthe organization and arrangement 'of v the container, driving.l'n'ea'nsy 5an das'sociated ap "paratus, necessaryto .therieiiicient 'employfj menti of .the apparatus'in; effecting refrigeration, all 'as hereinafter migre sp'efciically set orthand particularly polnted ".out in'thel, `a'-ppend ed clain's.v 7^ l systems employedin a' refrigerating ingr theinvention may b efdened andv differ#` etiated l'from thel prior art, with exactnes's,

wei' have illustrated "in Lthe 4accompanying avvings, a refrigeratingf-riiachine embody# .Bisa section ythrou' hfi' the liquefying end of the dumb-bell container taken on the line 3-3 of Fig. 2; Fig. 4 is a section through the liquefying end of the dumb-bell container taken on the line 4 4 of Fig. 3; Fig. 5 is a detail partly in sectienof the pressure equalizing valve and its operating mechanismytaken on l'the line 5 5 of Fig. 3; Fig. 6 is a section' through the 'vaporizing end of the dumb-bell container taken on the line 6-6 of Figs. l

and 7; Fig. 7 is a section through 'the vaporizing end of the dumb-bell container taken on line 7-7 of Fig. 6; Fig. 8 is a section through the Vaporizing end of the durrb-bell container taken ion line 8-8 of Figs. 6 and 7; and Fig. 9 is a detail section v ofthe collectors showing the surface 'of the liquid contained in the vaporizing end of0 the dumb-bell container, while the machine is in motion, taken on the line 9-9 of Figs.

6 and 7.

A dumb-bell shaped hermetically sealed container has two enlarged end portions A and B which are connected by a hollow shaft C. The enlargement A is herein termed the liquefying end and the enlargement B, the vaporizing end.

The two enlargements A and B of the con-1, tainer are connected by a hollow Shaft C.`\

through a pipe g when the machine is in operation and a like quantity drawn olf through a piper/2. ln this way, the temperature of the cooling water in tank Cr Ais maintained substantially constant, such heat as is imparted to the water from the liquefying end of the container, escaping in the water which is drawn off and in what vapor Amay arise from the water in the tank Cr.

"lhe hollow shaft C projects through an opening in the wall of a brine tank H which may contain freezing flasks l if desired and the vaporizing end B of the container is located in this tank with a proper amount In practical applications of the apparatus to refrigerators .having compartments for cold storage it is, of course, necessary to shape and place the rbrine tank H 4with or The enlargement A, as shown, is formed of `\without brine-circulating pipes in such mantwo substantiallv hemispherical shells a and a', While the enlargement B consists of two shells b and b which together inclose a chamber of somewhat greater diameter than its -thickness axially. A driving shaft D projects axially from the outer end of the shell a of the liquefying end A and is provided with tight and loose pulleys d and d', respectively, or equivalent driving connections, such as couplings for direct drive or friction elements.

vThe dumbbell container is mountedto be rotated as a whole in bearings E and F located adjacent the walls of the liquefying end A, in which bearings the shafts C and I D are respectively journaled.

T he bearings E and F are supported upon the upper edges of the walls of a tank Cr, and the tank G is filled with cooling water j to a level below the bearings and at which level a suitable amount of the surface of the liquefying end A of the container will4 be submerged. i A hood Cr is provided to confine and return to the tank the water which would be carried up and dashed about by the rotation of the container. vWhen the v kept circulating through the tank Cr, a suitable quantity being constantly supplied ner that it will cool these compartments, convection of the liquid being utilized, and an. infinite variety of arrangements with this purpose in View are possible.

The interior structure of the dumb-bell container and itsycontained parts will now be described iii/detail.

rlhe hollow shaft C projects into the chamber within the liquefying end A of the container and is suiiciently stifl'l to support all of the working parts which Vare inclosed within the liquefying end A without re` quiring a support for its free end upon the shell a.

At about the center of the liquefying enc A an eccentric c' is secured upon the hollow shaft C by a key c which prevents rotation of the eccentric upon the shaft, and screw c2 engaged with both the key c and the eccentric c secures the eccentric against endwise movement on the shaft C. Two castings J and J are bolted together and hung loosely on the shaft C within the liquefying end A and these castings provide certain chambers, within one of which chambers j the eccentric c works.

to oscillate on trunnions. These cylinders y" arepreferably arranged at an angle of from one another (see Fig. 2) both being located below the shaft C. Each of the cylinders j has a piston 03 connected rigidly to a piston rod c4 which works through a long close bea-ring on one head of the cylinder and is rigidly connected to an.` eccentric ln this chamber j f two double-acting cylinders j are mounted strap c5 Worlcing on the eccentric c'which imparts reciprocating movements to the pistons and oscillatingmovements tothe cylinders vwhen the container isrevolv'edand casting J andthe ports je are alternately registered by the oscillation'of the cylinders with ports 7'41 emerging from the said lats'j3-- on the wall of the casting J q and comlnunicating witha passageway jfwhich is always' in open communication with the interior of the hollow shaft C. v

In connection with the description we have found it Jconvenient to consider the material used "in the. container as sulfur dioXid SO2 and the vapor of the gas is dra-wn linto the cylinders from the hollovi7 shaft vC through the passageway jf" and ports js and i2, then .in registry,`by the suction strokes of the pistons c3 and is compressed by the reverse strokes of the pistons, the outlet from the cylinders' being through springseated outlet valves j (see Fig. 2) .opening 'directly into the chamber y.

The cylinders J with their pistons and strap'connections to the eccentric c constitute va. compressor which takes vapor from the vaporizing end B throughthe hollow shaft C and compresses it inthe liquefying end. A. Compression lis effected by virtue of the fact that the cylinders are prevented by gravity from revolving while the eccentric a revolves 4with the container.

In addition, to the c/enter of mass ofthe castings J and J being placed far-below the aXis, a heavy weight K (see Fig.- 3) preferably'of lea'd is attached to the bottom of these castings and aids in resistingthe tendency of the. castings and cylinders vto revolve.

The mechanical heat due to the comp-res.-= sion of the SO2 and the latent heat of va-f porization are conducted away through the walls of thecontainer which are preferably made of a good heat conductor,"such -as bronze. Liquid SO2 passes out ofthe chain-1'l y ber. jthro'ugh holes jl? in the bottom-of the chamber andY attains the velocity ofthe container by friction withthe walls aidedfby Wings a2 whichp'roject fromvthe shells a andl a', andw takes theform of an annulus at the greatest diameter ofthe chamber 'byvirt'ue`""' of the centrifugal forceresulting ..froniuitsz-l l rotation with the container.v

. A closecontact of theJ Cylindrs j, agai the flats js on the casting J is insured by subjecting the cylinders 'tothe ,pressurel of springs js.

'A` collector or-,s'coop Y mounted on the casting J and which, therefore, does no't revolve, projects upwardly to the 'innensutr chamber v j. together with 4rliquid' face of the revolving4 annulus' of liquid and i, dlverts a smallv stream of theliquid into a receptacle or chamber jm the castingJ v when the machine is in motiont The oil which 1s usedfor lubricating the working 70* parts is lighter thanl thefliquid SO2 and therefore lies upon the inner surface of the ing the lip jl? int the chamber y'. The col lected oil drains vout through the apertures 7'12 upon the surface of the revolving annulus of liquid and becomes a part thereof to be .again collected byy the" scoop j" and passed over the working parts.y vThis circulation of the oilover the lcompressor parts effects the required lubrication within the container andthe rate of circulation of the oil is dependent upon the area of the apertures j in the bottom ,of the chamber j.

The collector or scoop j". isj-formed to provide a closed channel which conducts the entering liquidbelow the surface @of that already contained in the lseparating refcep- A tacle jl" avoiding to a considerable extent the foaming and emulsifying ofthe oil and liquid SOZand allowing separation by grav. ity to more easily and quickly takev place.

p The liquid'SG2 passes through a screen head jlaand rises in a pipe j which empties into a reservoiry'15 in the casting J atthelevel-V 100 which the SO2 assumes. under the head of thel oil overflowing the lip ju. v Itv will be noticed that the liquid SO2 which lows'into reservoir j15 is practically] 'free of oil-'and .is -rcady to be conducted to'l05 'tom'` ofthe ,reservoir j, which-aperture communicates with thetiinterior. of 4a pipe j located-Within the hollow shaftC;v Thei 110= valve jlfisclosed -by theweight of a float j1.8'an'dis only. opened when suilicient liquidv SO2 is present inthe reservoir -jlsrtoraise the* float j. l It will thereforebeseen that the valve j will only permit the passage of 1M1.5'

liquid. SO2 andv will never-allow vaporto pass through into thev vaporizing end. l This arrangement is provided. to avoid the trans"-A prtwhil'jtghe.machine is'running, of heat .f byf'va or` 'into' that portion of.' the apparatusv '129.1 in which.;thetemperature has beenlowered. 'Ehepipej` ju. is rigidly I.secured to thecastinglr .A J @adjacent-the valve fm-andi is heldl with,

that casting.against'rotation. ,z

Ehehol1owsha'ft C proj ects- 'for s :om'edis-"l *@255' tance 'also-intol Lthe interior ofjthe evaporate y ing end Bandonthisjprojecting endV pf' the f' shaft is loosely hungavcor'nbined-liquid yoilf'cin'mlatorand vseparator whic r .come prises (see lfigsl,I and' 8) a centrall cast-j.

I `that in the end A, being produced by the` ing Z which provides the 'supporting bearingl Z resting onvthe projecting end of the hollow7 shaft C, apassage Z2 by which vapor from the interior of the vaporizing end B above the shaft C may pass downwardly,

and into the end of the hollow shaft C, and a passage Z3 by which oil may pass from a separator Z 9 upwardly and flow into the end ofthe hollow shaft C. r1`he pipe j passes entirely through the casting Z and discharges against the wall of the outer shell b and the casting Z is secured to this pipe j by a key Z4 so that the circulator and separator is held stationary with the pipe j which is in turn held stationary with the castings J land J and the weight K in the liquefying end A.

A cylindrical circulatingreceiver Z5 open at its top ismounted .on the casting Z which casting forms the bottom of the receiver. A smaller cylindrical separating receiver Z6 is mounted within thereceiver Z5 -adjacent its forward wall, z'. e., that wall toward'which the outer shell of the container moves, and

the casting Z also forms the bottom of this or collectors Z1o and Zu are mounted in tandem on the upper edges of the receivers Z5 and Ze respectively and extend upwardly to the inner surface of a revolving annulus of liquid in the end B which is similar to frictionof the liquid against 4the walls of the container aided by wings b2 projecting inwardly fromthe shells b and b. The collector Z11 being the foremost of the two deiects a small stream of the liquid from the ,l

inner surface of the revolving annulus of liquid into the receiver Z, and in view of the fact that some oil unavoidably gets into the vaporizing end B this small stream of liquid will consist of some oil and some liquid SO2 and it is found in practice that even with the greatest of care some solid impurities appear and these solid impurities being heavier than the liquids will collect in the pocket ZS-'and thus be permanently removed from the circulating system. AThis pocket Z8 also receives the stream of mixed SO2- and oil and'aids in a measure in preventing the formation of a froth. The

-mixed oil and liquid SO2 flow down the tube Z7 to a point below the surface of the liquid contained in the separating chamber Z", this point beingJ approximately at the static level of the liquid S02 when both that liquid and oil are present in the separator. This introduction of the mixed liquid S02 and oil at the static level of the SO2 already contained in the separator avoids frothing and emulsifying and aids gravity separation. A distributing pipe Z12 extends -upwardly fromthe loweimost part of the `of the collector'Z11 deflects a small stream of liquid SO2 alone, the film of oil havingbeen removed by the preceding collector, and directs this liquid into the circulating receiver Z5 from which it flows` by a'distributing pipe Z13 against the wall of shell b. The liquid SO2 whichpasses through the circulating receiver Z5 is simply taken from the inner surface of the revolving annulus of liquid and discharged upon the wall of the container near the axis of .the machine, the object being to offer by circulation of the SO2 in the vaporizing end more opportunity for the vaporization of the li uidand a greater area of cooled surface than would be given if the refrigerantwere brought into contact with this wall but once and in this connection it is important to note that the refrigeranfis by means of the velocity of rotation of the container quickly thrown to the .outermost portions of the vaporizing end B,

' which would be present if a flat or broader scoop were employed. The form of these Scoops is-of considerable importance in connection with the working of a machine of this type.

A pressure equalizing valve 01 mounted to rotate with the hollow shaft C is provided to permit, when open, the compressed vapor in the liquefied end A, to pass directly into the hollow shaft C, and thence to the vaporizing end B. A'spring c tends to open this valve when the machine is at rest and is overcome by the outward throw of weights o8 supported on pivoted arms 07, during the rotation of the container, and the valve 01 is held closed. -Thearms 07 are |Lshaped and are provided with intermeshing gear teeth 09 to cause them to move together. The valve 01 is connected with one of the arms c7. The object of this arrangement is to effect a gas exit from, and an equalization of the pressures in, the two ends of the container when the `machine isl att-restthat the vaporizer may beemptiedwhen desired,

and the compressor may not be required toA Work against pressure atl the start,` 'While'the two. ends of the container will be automati- Y .cally isolated when the container has approximately reached its normal speed of rotation.

The driving shaft D is hollow and is pro- I gas is introduced into the -cohtainer'is noti shown in the drawing as it formsnojpart of the present invention.' The gas having been introduced intothe container and the valve 'for the-segregation and return vto the vaporplug @Z2 screwedv shut, the nozzle is removed and a permanent'plug d3 ,is screwed into the outer end of the shaft d and a melted or plastic sealing materiale?1L is applied to eifect f the final hermeticusealingofthe container.

cant from the vliquefying lend o fthe con-A In inclosed refrigerating machines of, this avoid the passage .of vapor and the lubri- .tainer to the vaporizingendv ofV the coliliquid tainer by operating the valve by means'of a float being arranged to risein the liquid SO2 and fall in thelubricant oil. This arrange` ment made it necessary "for the float to work j in thel narrow range between the speciiic gravity of the liquid SO2 and that of the lubricating oil, a condition requiring a degree of accuracy of adjustment and'de'licacy of operation which wasundesirable .in apparatus intended for unattended working .for extended periods.4 In the present device the separating chamber j m hasbeen vso placed 1n connection with the reservoir i12, that this reservoir receives the liquid SO2 practically freedl from anyfmechancally .mixed lubricating o"il which would collect upon thesurthe range accuracy of adjustment` is unnecessaryand ,there is always present vsuii'icie'nt lifting l A power within the liquid SO2v and sufficient v this content of the i-lubricant will* beflft within the vaporizingendA of the container, and must be conducted therefrom, back to ua1 i-`- the* .weight when-the float is surrounded 'byV` yvapor to: effect the operation-oflthelggalvet.,z with unfailing promptness and security;- l. A'The liquid SO2-.which entersthe reservoir j and is permittedtopass therefromintothe `vaporizingl end, nevertheless', contain s .v n some of the lubricating bil in what'may be considered solution and -upon the vaporition of the lliquid SO2 inthe vaporizingfend the lliquefying end or its collection vin Atity will seriously affect the' working 1o machine. Therefore ithas been necessary v to combine with the separator, reservoir'and Vg l in solution to lthecant, which in practicewill ordinarily be -suflicient to immerse .the working parts of the compressor, iscirculated and practically isolatedin 'the'icompressor end, whileA the refrlgerantin substantial quantity is prac- -c'irculated over'th'e walls thereof, the mutual isolation lof'theiubricant and therefrigerant 1 l Itwill be observed 'that in th 'organiza- `tion descrlbed a substantialquantity of lubritically-'isolated'in the vaporizing lend and is sof being continuously maintained'by providing j izei" of the vaporized fand subsequently liquefied refrigerant, while guarding against .the flow of free lubricant to the vaporizer and-providing for the segregation and return to the. compresser' of that quantity of lubricant which is necessarilyfcbntained in or emulsied with the .compressed lubricant. Having thusdescribed ou'rinvention what we'claimis; D -f l. lIn inclosed refrigerating apparatus having a liquefying compartment and a vaporf izingj compartment and containing a refri gerant i'n liquid and v apor states'a-nd a lubricant, the combination Iof a refrigerant reservolr vwithin'said liquefying compartment 'having an outlet leading to said vapori'zing compartment, a valve arranged in said outlet,lva float designedto be positioned bythe surface of juncture of *liquid and vapor refrigerant in said reservoir and connected ,with saidvalve to operatethefsame to disj .charge through' saidoutlet only the liquid content of said reservoinand a separator'.-

'adapted for the mechanical separation of fthe lubricant and liquid refrigerant and thek dischargeof the liquidrefrigerant alone into said reservoir; with a` second Aseparator within the said vaporizinggcompartment adapt ed to' receive mechanically 'mixed liquid refrigerant and lubricating appearing wi'thin v the vaporizing compartment upon the-vaporii 'i `z atin of theA refrigerant', and meansl for "eonveying'the mixed liquid refrigerant and v llubricant .within Athe vaporizing compart- Ifnent intoh'said' secondseparator; a, conduit` fffforlconveying the separated lubricant'frm .1

v l`said secondi-separator to said liquefying '.120

cti111Pltrnellt, and la conduit-for conveying Stheseparated refrigerant lfrom saidsecond4 --separatofr tothe wall ofsaid vaporiz'ingcom'-- .artment; substantially as andf-forthe purl finclosedjh refrigerating' apparatus havingLa'4 liquefj'fing'g compartment and a va'porizmg compartmentuadapted to" con- .tam a'refrigerant in vaporfand liquid lstates ralubricant,V `the combinatlo'n withuve in the liquefying compartment of a refrigerant reservoir having an outlet leading to said vaporizing compartment, a *valve' arranged in said outlet, a float designedto be positioned by the surface of juncture of liquid and vapor refrigerant insaid reservoir and connected with said valve to operate the same to discharge through said outlet only the liquid contentl of said .reservoir and a separator adapted for the mechanicalv separation of the lubricant and liquid refrigerant and the discharge of r)the liquid refrigerant alone into said reservoir; substantially as and for the purpose set forth.

3. ln inclosed refrigerating apparatus having aliquefying compartment and a vaporizing' compartment containing a refrig- Y'erant in liquid and vapor states and a lubrica-nt, the combination Within the vaporizing 20 compartment of a Separator adapted'to 'receive mechanically mixed liquid refrigerant and lubricant, and means for conveying the mixed liquid refrigerant and lubricant colv lected Within said vaporizing compartment into said separator; a conduit for conveying the separated lubricant from said separator to said liquefying compartment, and a conduit for conveying the separated refrigerant from said separator to the Wall of said vaporizing compartment; substantially as and for the purpose set forth.

.4. In a rotary refrigerating apparatus of the character described having liquefying and vaporizing compartments, the liquid contents of Which assumethe form of annuli, a non-rotating nrember Within the 'va- `porizing compartment, comprisinga collector projecting Within the surface of the annulus ofliquid, a separator arranged to receive liquid from said collector, a conduit leading from the upper part of said separator to said liquefying compartment for conveying separated lubricant from the separator to the liquefying compartment, a secondv conduit leading from the lower part ofthe separator and discharging toward the Wall of the vaporizing compartment for conveyr ing separated liquid refrigerant from the separator and discharging't upon the side Wall/of the vaporizing compartment, and a third conduit arranged to receivev liquidv cant, a separator in the liquefying compartment for separating the lubricant from the liquid refrigerant, a reservoir for the sepa-- rated liquid refrigerant also in said compartment, means for transferring the separated liquid refrigerant from the separator to the reservoir, a conduit fortransferring the liquid refrigerant from said reservoir to the vaporizing compartment, and means for returning the vaporized refrigerant from the vaporizing compartment to the liquefying compartment, and for liquefying it therein, in combination With a second separator Withinthe said vaporizing compartment adapted to receive mechanically mixed liquid refrigerant and lubricant appearing Within the vaporizing compartment upon the vaporization of the refrigerant, means for conveying the mixed liquid refrigerant and lubricant Within the vaporizing compartment into said second separator, and means for-returning the separatedlubricant to the liquefying compartment; v substantially as described.

7. ln apparatus ofthe character described having liquefying and vaporizingv compartments, a substantial body of liquid refrig-` erant maintained in said vaporizing compartmentl and a separator and circulator adapted to separate lubricant from said body of liquid refrigerant and return said lubricant to said liquefying compartment and-to repeatedly bring said liquid refrigerant into contact with the Walls of said 'vaporizing compartment; substantiallyas del scribed. i

8. lnclosed rotary refrigerating appara'tus having liquefying and vaporizing compartments, lubricant circulating appliances designed to substantially isolate and circulate lubricant Within said liquefying compartment, a separator and circulator Within the vaporizing compartment adapted to separate lubricant from the liquid refrigerant and to discharge the separated liquid refrigerant into the vaporizing compartment upon portions-of the end Walls thereof from which the refrigerant flows under the centrifugal force to a liquid annulus at the periphery of said compartment, means in the liquefying compartment for separating the liquefied refrigerant and returning itto the vaporizing compartment, and a lubricant replacement device adapted to return to the liquean annulus at the p'eripheryof the compartment, in combination with means within the vaporizing compartment for taking up the refrigerant therein and dischargingit with-v in the compartment upon portions of the end Walls thereof from which the refrigerant fiows under centrifugal force to the said annulus, whereby the refrigerant is repeat'- edly circulated upon the walls of the vaporizing compartment; substantially as described. y

1 0. AInclosed rotary refrigerating apparatus having liquefying and vaporizing compartments, lubricant circulating appliances desi ed to substantially isolate and circulate lulrl'icantl within said liquefying compartment, means for returning the liquid refrig-V erant to the -vaporizing compartment 1n which it assumes the form of an annulus at the periphery of the compartment, means for taking up the Vsurface layer of said annulus and for separating lubricant therefrom, means for vdischarging the liquid re-y frigerant from which the lubricant is Aso separated again into the vaporivzlijng compartment, and means for taking up a sube surface layer of said annulus and discharging it within the vaporizing compartment upon portions of the end walls thereof from which the refrigerant iowsunder centrifu' gal force to the said annulus;l substantially as described. v Y f 11. In apparatus of the character described, -a rotary vaporizing compartment having an oil separator and refrigerant cir- `culator comprising a substantially` stationary receptacle carrying a pluralityof tracking collector lingers, a separating compartment y within the receptacle and'v to which the mixed lubricant and refrigerant collected bythe l leading collector finger is conducted, a conduit for the separated lubricant from said compartment' to the liquefying compartment, lal second conduit for conducting the separated refrigerant to the Wall of thevaporizing compartment, and a conduit by which ,y

the liquid ,collectedby the tracking collector finger is conducted to the wall of the vaporizing compartment;V substantially as described.

12. In apparatus of the character described a rotary vaporizing compartment in which the liquid refrigerant and lubricant will assume the form f -an annulus, a lubricant separator, means for removing the 'outer 'layer of the annulus and conducting it to the separator, a conduit for returning-the separated lubricant to the liquefying comparti ment, a second conduit for 1 returning the separated refrigerant to a lportion of the wall of the vaporizing compartment from which it will flow to the annulus under the I impulse of centrifugal force and means for removing an inner layer of the annulus and conducting it to a portion of thewall of the vaporizing compartment from which -it will iow to the annulus under the impulse of centrifugal force; substantially asvdescribed.

13. In'refrigeratingapparatus, the combination with rotatable container of substan- -tially stationary channeled collector 'scoops Within' said container projecting outwardly and terminating ad] acent the peripheral wall of said container in an open-ended mouth V-shaped in cross-section.

14. In refrigerating apparatus of the char-` acter described, the combination with the rotatable container and separator therein of a collector-scoop having a V-shaped mouth and mounted to convey liquid from adjacent arator. j v

In testimony whereof we affix our signatures, in jtgkpesence of two witnesses.

WYRCEL AUDIFFREN. i HENRI ALBERT SINGRN.' Witnesses: .Q H. C. CoxE,

JACK H. BAKER.

`9o the periphery of said container to saidzsep- 

